Quick-Applied Flashing Options for Every Detail
April 9, 2019
Versico offers three different types of VersiGard® EPDM Quick-Applied (QA) Flashings to tackle the variety of details found on any given roof. All three feature the proven weatherability of EPDM and come with 30-mil of QA seam tape to create a watertight seal. The primary difference among the three is the amount of cure in the rubber, and the process used to manufacture them.

QA Uncured EPDM Flashing is used to flash irregularly-shaped objects or details with multiple angle changes. The uncured state of the flashing allows the rubber to be formed and stretched into place without reverting to its original shape, like cured rubber. The flashing formulation is designed to cure on the roof with exposure to heat. Since we need to limit heat exposure in the manufacturing process to keep the product uncured, we require all edges to be lap sealed. This is to keep water from getting between the flashing ply and the tape ply while the material cures on the roof. T-joints, corners, and pockets are all made from uncured flashing; which has a 9-month shelf life.

QA Overlayment Strip – often called “semi-cured” flashing – utilizes the same uncured flashing formulation, but is semi-cured with heat during the manufacturing process. The overlayment strip has the dark black look of uncured flashing, but is 70% cured to add tear resistance for stripping in metal edging or end laps. QA Overlayment Strip is packaged without the diamond pattern film as it is removed during the semi-curing process. This gives you an easy way to tell the difference between a roll of QA Uncured Flashing and QA Semi-Cured Flashing. Due to the semi-cured nature of QA Overlayment Strip, it can seal step-offs at splice intersections of 60-mil rubber without the need for T-joint covers. QA Overlayment Strip is better suited to strip-in seams than QA Uncured EPDM Flashing, as you can eliminate the need for lap sealant and T-joints.

QA Cured Cover Strip is made with the same 60-mil non-reinforced membrane as our standard sheeting, and is then laminated to 30-mil of QA seam tape. This product is primarily used for stripping-in metal or end-laps, and offers the same finished appearance as the field membrane. Due to the fully-cured nature and thickness of the product, T-joints are required at splice intersections.

VersiGard White EPDM Peel & Stick Flashing is available in uncured flashing and cured cover strip options; and is approved for use on both EPDM and TPO roofing systems. VersiGard’s White EPDM Peel & Stick Uncured Flashing has a more aggressive cure package to account for the fact that the white flashing will not gain as much heat naturally on the roof. This translates into a shorter shelf life of 6 months. Keeping your white or black uncured flashings cool during long term storage will help you to maximize its shelf life.

Versico has all your flashing needs covered. For more information about pressure-sensitive flashings, please contact your Regional Technical Manager.

    Ron Goodman
    EPDM Product Manager
    Product Marketing
    ron.goodman@carlisleccm.com
December 5, 2019
Seam Probing

Seam probing is an important final step in the hot air welding process because it is a good indicator to determine if proper fusion has occurred between the membrane layers. Whether the membrane is TPO or PVC, both products need to be probed – but with slightly different techniques. Probing must be done once hot air welds have thoroughly cooled (at least 20 minutes). Premature probing can damage warm seams. Hot air welded seams must be probed throughout the day to check seam quality and to make proper adjustments to hot air welding equipment. The repair of deficiencies must be done routinely throughout the day, but no later than the end of each workday. A blunt or dull cotter pin puller is an acceptable tool to perform the probing task. Versico offers a custom-designed Seam Probe that incorporates an ergonomic, threaded handle with a heat-treated, plated steel tip. With continued use these tools will wear down, creating a tip that is too sharp for probing. Blunting the tip is necessary when this occurs. When a substantial amount of probing is necessary, an extension pole can be threaded into the handle of the Versico probe. This allows the operator to stand up while probing long runs of field seams. Getting started Draw your probing tool tip along the edge of the heat welded seam. Apply firm pressure to probe the seam junction, but not into the bottom membrane sheet. The tool will not penetrate into the lap area of a properly welded seam. If the seam probing tool penetrates into the welded overlap area, use a water-soluble marker to mark the beginning and the end of voids or wrinkles in the seam edge. Repair seam deficiencies as soon as possible using the hand held welder. Versico recommends that repairs be made the same day deficiencies are discovered. Probe repaired seams after they have cooled completely. If the repair is acceptable, wipe off the water-soluble marker lines; if not acceptable, repair the seam using standard heat welded overlay procedures. Another reason all laps must be probed each day soon after they have cooled is to verify the welder set-up is effective. Particular attention must be given to all membrane intersections and heat welded seams at insulation joints. In addition, there should be periodic checks (including at the start of each day) to verify good peel strength. Considerations when probing TPO systems 1.) TPO does not "flow" like PVC. If you observe an area in which you see "flow" of the bottom ply, scorched areas of detail/flashing membrane, or scorched field membrane welds, these areas should be probed. If these areas are overheated to the point of membrane damage, an overlay repair will be required even if the weld probes successfully. 2.) A properly heated field membrane weld will typically have a visual "sheen" approximately 1/2" wide on the bottom sheet at the weld overlap. When walking seams, look for the sheen. If it is not present, probe to ensure weld quality.  3.) TPO seams require a minimum 1.5" weld. Welds less than 1.5" must be overlaid as stated in Versico’s specifications and details, even if probing does not produce deficiencies. Considerations when probing PVC systems 1.) Welds on PVC systems should produce "bleed out". Bleed out refers to the flow of the bottom ply (of the top sheet) outside of the weld. If you do not see bleed out at seam areas, this increases the probability the seam did not receive enough heat when it was welded. Be sure to probe these areas to ensure weld quality. 2.) PVC is a “softer” and more flexible membrane than TPO. As such, a different probe should be used than the one used on TPO roofing systems. The PVC probe should have a blunt/dull tip, or utilize a "hook" screwdriver with a flat head.  3.) PVC seams require a minimum 1.5" weld. If you observe welds which are less than 1.5", these should be overlaid following specifications and details, even if probing does not produce deficiencies. Remember, application of Cut Edge Sealant should not begin until all probing is completed. Please contact Jim Gage with questions.     Jim Gage     Senior Technical Specialist     Product Marketing     james.gage@carlisleccm.com

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November 21, 2019
Benefits of Using White P&S EPDM Accessories on TPO Systems

Versico Roofing Systems allows contractors to use several of its productivity-boosting VersiGard® EPDM Peel & Stick accessories on VersiWeld® TPO roofing systems with up to 20-year Total System Warranties. VersiGard White EPDM Peel & Stick (P&S) accessories can provide substantial labor savings on projects with hard-to-flash penetrations and are ideal when using a generator and hand welder isn't practical. Regardless of which roof system is being installed, experienced roofers understand there is always a good chance of encountering hard-to-flash roof penetrations, or simply a high volume of penetrations. Determining the best way to flash these items in a productive manner while ensuring a long-term watertight seal can be a serious challenge. This is where VersiGard White P&S accessories come into play. Keep in mind your alternative EPDM flashing options for TPO systems: Run into a hard-to-flash penetration? VersiGard White P&S Uncured Flashing is an option to consider. This material is highly malleable and adapts easily to odd shapes and surfaces, making it ideal for flashing pipes, scuppers, and other irregularly shaped penetrations. Overwhelmed by hundreds of roof curbs? Boost productivity by flashing curbs with VersiGard 20" White P&S Cured Flashing in conjunction with VersiGard White P&S 7" x 9" Inside/Outside Corners. This is the fastest way to flash roof curbs and can reduce application time by up to 70% when compared to non-P&S flashing options. White EPDM P&S accessories are also a great option for repairs on TPO roofs when access to power is difficult or it isn't practical to use a generator and hand welder. Transporting generators, power cords, and welders to difficult-to-reach roof sections can be cumbersome and labor-intensive. This additional labor can be avoided by white EPDM P&S accessories, since most of these materials will fit snugly into a backpack! If you're interested in receiving a free trial of VersiGard White EPDM Peel & Stick accessories, please submit a request using this form. Approved Products: VersiGard White EPDM P&S Pipe Seals VersiGard White EPDM P&S Pourable Sealer Pockets VersiGard White EPDM P&S Inside/Outside Corners and T-Joint Covers VersiGard White EPDM P&S T-Joint Covers VersiGard White EPDM P&S Uncured Flashing VersiGard White EPDM P&S 20" Cured Flashing     Ryan Ferguson     EPDM Product Specialist     Product Marketing     ryan.ferguson@carlisleccm.com

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October 10, 2019
Special Color TPO Accessories

As the demand for different colored roof membranes has grown, Versico introduced its TPO Color Palette with five new colors. In addition to standard white, gray, and tan, Versico’s TPO Color Palette now features Rock Brown, Slate Gray, Terra Cotta, Patina Green, and Medium Bronze. Projects that use special color membrane from the TPO Color Palette usually need flashings and accessories in the same color. Here, contractors have two choices, one of which is painting standard accessories to match the membrane. However, this is a great opportunity to use Versico’s custom TPO accessory program and avoid painting altogether. All of Versico’s custom accessories are available in the five TPO Color Palette colors, as well as white, tan, and gray. Whether it’s a simple split pipe seal or a complex prefabricated curb wrap, Versico can make it in all eight TPO colors and get it to the job quickly. In addition to being available in eight colors, here are some other great advantages to using custom flashings from Versico: • Save time vs. field fabrication: Trying to field-fabricate flashings can be time-consuming work, even for the most skilled and experienced roofers. Using prefabricated flashings saves time. • No need for paint: There’s no need to prime and paint the accessories to match the membrane; just install and go. • Speed: Custom accessories can be fabricated and shipped within days, not weeks. • Quality: All of Versico’s custom TPO accessories carry the Certified Fabricated Accessory (CFA) stamp of approval, indicating they are eligible for coverage as part of Versico’s Total System Warranty. Next time you have a project using Versico’s TPO Color Palette TPO, consider using custom accessories to make the job faster and easier to install. VersiWeld TPO Special Color Painting Guide  VersiWeld TPO Special Color Program Custom Accessory Quote Request Form      Adam Burzynski     TPO Product Manager     Product Marketing     adam.burzynski@carlisleccm.com

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